Abstract: Robustness to photometric transformations and invariance under geometric transformations are two crucial criteria that a shape descriptor must satisfy. In this direction, orthogonal moments ...

2D shapes can be described by their sides, their angles and their symmetry. The sides might be equal in length and some might be parallel. The angles could be right angles, but sometimes they are ...

Two-dimensional (2D) shapes are completely flat. They cannot be picked up. 2D shapes can be found printed in a book or you can draw them on a piece of paper. 2D shapes have sides and corners (also ...

Your 1st to 3rd grade students will love using this scavenger hunt in nature to explore 2D shapes. They can enjoy spending time completing an outdoor nature scavenger hunt while they search for ...